May 2018 was the warmest May on record in the contiguous US, with an average temperature of 65.4 degrees F, according to the National Centers for Environmental Information. The figure was 5.2 degrees above average and surpassed the previous record of 64.7 degrees F set in 1934. The month also saw more than 8,590 daily warm station records broken or tied. The average precipitation for May was 2.97 inches, 0.06 inch above average, with more than a quarter of the contiguous US remaining in drought.